No spin diffusion in the spin 1/2 XXZ chain at $T=\infty$: Numerical asymptotics

Details No spin diffusion in the spin 1/2 XXZ chain at $T=\infty$: Numerical asymptotics No spin diffusion in the spin 1/2 XXZ chain at $T=\infty$: Numerical asymptotics

1997-06-19

arxiv.org/abs/cond-mat/9706194v1

Physics

Condensed Matter

9 pages in harvmac with 4 figures

Scientific paper

We analyze the recent numerical computations made by Fabricius, L{\" o}w and Stolze to show that the long time behavior of the zz correlation function of the spin 1/2 XXZ chain at $T=\infty$ is very well fit by the formula $t^{-d}[A+Be^{-\gamma (t-t_0)}\cos \Omega(t-t_0)]$ where $d$ is substantially greater than 1/2. This confirms the conclusion that there is no spin diffusion in this model.

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